Prefix with pagan (3)
I believe the answer is:
neo
'prefix with pagan' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for neo that I've seen before include "Prefix meaning new of modern form of" , "Prefix donating new" , "Prefix meaning new - try one" , "language" , "New (suffix)" .)